From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 1AMv4A-0002Xb-00 for ; Thu, 20 Nov 2003 12:06:14 -0800 Received: from blacksheep.csh.rit.edu ([129.21.60.6]) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.24) id 1AMv4A-0006OT-1B for user-mode-linux-devel@lists.sourceforge.net; Thu, 20 Nov 2003 12:06:14 -0800 Received: from dijkstra (dijkstra.csh.rit.edu [129.21.60.152]) by blacksheep.csh.rit.edu (Postfix) with ESMTP id 0EEF43EC for ; Thu, 20 Nov 2003 15:06:12 -0500 (EST) Received: from mdz by dijkstra with local (Exim 3.35 #1 (Debian)) id 1AMv47-00036S-00 for ; Thu, 20 Nov 2003 15:06:11 -0500 From: Matt Zimmerman Subject: Re: [uml-devel] Host panic triggered by UML Message-ID: <20031120200611.GK9377@dijkstra.csh.rit.edu> References: <200311201915.29188.blaisorblade_spam@yahoo.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200311201915.29188.blaisorblade_spam@yahoo.it> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: Date: Thu, 20 Nov 2003 15:06:11 -0500 To: user-mode-linux-devel@lists.sourceforge.net On Thu, Nov 20, 2003 at 07:15:29PM +0100, BlaisorBlade wrote: > Nov 19 04:40:24 blaisorblade kernel: Unable to handle kernel NULL pointer > dereference at virtual address 00000000 > Nov 19 04:40:24 blaisorblade kernel: printing eip: > Nov 19 04:40:24 blaisorblade kernel: c015421b > Nov 19 04:40:24 blaisorblade kernel: *pde = 00000000 > Nov 19 04:40:24 blaisorblade kernel: Oops: 0002 > Nov 19 04:40:24 blaisorblade kernel: CPU: 0 > Nov 19 04:40:24 blaisorblade kernel: EIP: 0010:[dcache_dir_lseek+299/384] > Tainted: PF > Nov 19 04:40:24 blaisorblade kernel: EIP: 0010:[] Tainted: PF > Nov 19 04:40:24 blaisorblade kernel: EFLAGS: 00010286 > Nov 19 04:40:24 blaisorblade kernel: eax: 00000000 ebx: c0d24160 ecx: > d6b15f08 edx: c0d24160 > Nov 19 04:40:24 blaisorblade kernel: esi: 00000002 edi: 00000000 ebp: > c0d24140 esp: d67cbf84 > Nov 19 04:40:24 blaisorblade kernel: ds: 0018 es: 0018 ss: 0018 > Nov 19 04:40:24 blaisorblade kernel: Process linux (pid: 18847, > stackpage=d67cb000) > Nov 19 04:40:24 blaisorblade kernel: Stack: fffffff2 c0d24140 00000000 > 00000000 c01540f0 d2473f20 c01433f8 d2473f20 > Nov 19 04:40:24 blaisorblade kernel: 00000002 00000000 00000000 > d67ca000 4014b008 00000002 a2533abc c01075b7 > Nov 19 04:40:24 blaisorblade kernel: 0000002f 00000002 00000000 > 4014b008 00000002 a2533abc 00000013 0000002b > Nov 19 04:40:24 blaisorblade kernel: Call Trace: [dcache_dir_lseek+0/384] > [sys_lseek+120/192] [system_call+51/56] > Nov 19 04:40:24 blaisorblade kernel: Call Trace: [] [] > [] > Nov 19 04:40:24 blaisorblade kernel: > Nov 19 04:40:24 blaisorblade kernel: Code: 89 10 89 42 04 b8 00 e0 ff ff 21 e0 > ff 48 04 8b 50 14 39 50 I've seen this same crash many times; I sent it to lkml but got no response. > (I've had another oops in the same call path and point, so I guess this > was the reason even the other time). > > This means that it crashes in fs/readdir.c:dcache_dir_lseek; after some > checks So, probably the oops happened while working on that folder: what > needs to be checked is if the tmpfs code creates an inconsistent > list(exactly, an inconsistent struct dentry.d_subdirs one, since p walks > into it). Do you think this is reasonable or not? It only happened for me using UML hostfs on a tmpfs filesystem, so I believe it is a tmpfs bug, yes. -- - mdz ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel